JPH06182006A - Golf club head - Google Patents

Abstract

PURPOSE:To provide a good-looking golf club head having a face member and head body made of different kinds of metals which are combined easily and firmly with each other. CONSTITUTION:In a golf club head having a head 12 and face member 11 formed with different kinds of metals the face member 11 is received in a recess 14 formed in the face surface of the head body 12. On the head body 12, a recess 15 is formed and a lug 16 to be engaged with the recess 15 by plastic deformation to prevent the face body 11 from falling out is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a golf club head having a head body and a face body made of different metals.
More specifically, the present invention relates to an improvement in a connecting structure between a face body and a head body.

[0002]

2. Description of the Related Art As a method of producing a metal club head called a metal head, there are an integral method in which the whole is integrally formed by casting, forging, etc., and a method in which a plurality of parts are formed separately and then these are integrated by welding. There is a dividing method to be used, the integrated method is mainly applied to iron club heads, and the dividing method is often applied to wood club heads.

In the above-mentioned integrated system, the entire head is generally made of the same metal material. Even in the divided system, each part is made of the same or the same kind of metal material from the viewpoint of reliability of welding strength. It is common to join and unite.

In recent years, attention has been paid to titanium, titanium alloys, etc., which are lightweight and have high mechanical strength, and metal heads using this kind of light metal are being used. However, since this kind of metal is expensive, the entire head is used. Is very expensive if made of this type of light metal. Also, light metals such as titanium and titanium alloys are suitable for the face body that occupies the face part of the head, but if a metal with a larger specific gravity than the face body is used for the head body that makes up the rest of the head, the center of gravity of the head Can increase the moment of inertia of
It becomes easier to adjust the height of the center of gravity of the head and the depth of the center of gravity from the face. Therefore, there is an increasing demand for metal heads constructed by combining different kinds of metal materials.

[0005]

However, when the face body and the head body are made of different metal materials, it becomes difficult to perform welding, and it is difficult to obtain sufficient welding strength. In addition, since the welded portion appears on the surface even after the finish polishing, the appearance is greatly deteriorated. On the other hand, if the face body is simply fitted into the recess or void of the head body by press fitting or the like, the face body may come off due to the impact during use.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a golf club head in which a face body made of different kinds of metal and a head body are easily and firmly coupled and which is excellent in appearance.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 provides a golf club head in which a head body and a face body are made of different metals.
The face body is housed in a space formed in the face surface of the head body, and a recess is formed in one of the joints between the face body and the head body, and a protrusion that engages with the recess is plastically deformed in the other. It is characterized in that the face body is prevented from coming off.

According to a second aspect of the present invention, in the golf club head according to the first aspect, the hollow portion of the head body has a bottomed recess that opens to the face surface of the face body, and the face body has the recessed portion. It is characterized in that it is brought into contact with the bottom surface to prevent the head body from being pulled out rearward, and the recessed portion and the convex portion are engaged to prevent the head body from being pulled out forward.

According to a third aspect of the present invention, in the golf club head according to the second aspect, the concave portion is formed on the outer peripheral portion of the face body, and is preformed on the peripheral edge of the concave portion of the face surface of the head body. The convex portion that engages with the concave portion is formed by press molding of the protruding portion.

According to a fourth aspect of the present invention, in the golf club head according to the second aspect, the recess is formed on the inner surface of the recess of the head body, and the face body is press-molded in the recess. The convex portion engaging with the concave portion is formed on an outer peripheral portion of the face body.

According to a fifth aspect of the present invention, in the golf club head according to the fourth aspect, the recess is formed on the inner surface of the head body near the bottom of the recess, and the bottom of the recess is near the recess. Is characterized in that a projection portion for plastically deforming the outer peripheral portion of the back surface of the face body is provided integrally or separately.

According to a sixth aspect of the present invention, in the golf club head according to the second aspect, the cavity of the head main body further has an opening that opens to the bottom surface of the recess and the back surface of the head main body, Has a projecting portion that projects from the back surface that abuts the bottom surface of the recess and fits into the opening, and the recess is formed in one of the joints between the projecting portion of the face body and the opening portion of the head body, and in the other. The convex portion engaging with the concave portion is formed by plastic deformation.

[0013]

In the golf club head according to the present invention, the face body housed in the void of the head body is formed by the plastic deformation of the concave portion formed on one of the joints between the face body and the head body. Since it is prevented from coming off by the engagement with the convex portion, the connection between the face body and the head main body is strong and the appearance is excellent.

In a golf club head according to a second aspect of the present invention, the void in the head body has a bottomed recess that opens to the face surface of the face body, and the face body contacts the bottom surface of the recessed body to form the head body. Since it is prevented from pulling out backward and is prevented from pulling out toward the front of the head main body by the engagement of the concave portion and the convex portion, the coupling between the face body and the head main body becomes stronger.

According to another aspect of the golf club head of the present invention, the concave portion is formed on the outer peripheral portion of the face body, and the face is formed by press molding of the protrusion portion formed in advance around the concave opening portion of the face surface of the head body. Since the convex portion that engages with the concave portion of the body is formed, the concave-convex engaging portion can be easily formed when the head body is made of a metal material that is softer than the face body.

According to another aspect of the golf club head of the present invention, the concave portion is formed on the inner surface of the concave portion of the head main body, and the face body is press-molded in the concave portion.
Since the convex portion that engages with the concave portion is formed on the outer peripheral portion of the face body, the concave-convex engaging portion can be easily formed when the face body is made of a metal material that is softer than the head body.

According to another aspect of the golf club head of the present invention, the concave portion is formed on the inner side surface of the head body near the bottom surface of the concave portion, and the outer peripheral portion of the back surface of the face body is provided near the concave portion on the bottom surface of the concave portion. Since the protrusions that plastically deform outward are provided integrally or separately, when the face body is press-molded in the recess, it is possible to easily plastically deform the outer peripheral portion of the back surface of the face body outward by the protrusions. Therefore, the convex portion that engages with the concave portion can be easily formed.

According to another aspect of the golf club head of the present invention, a concave-convex engagement portion is formed on the back surface side of the head main body at the joint between the projecting portion of the face body and the opening portion of the head main body for retaining. Therefore, the influence of the plastic deformation of the convex portion on the face surface can be minimized as compared with the case where the concave-convex engaging portion is formed on the face surface side. Therefore, a club head with stable finishing accuracy and characteristics can be obtained.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the drawings. In addition, in order to avoid redundant description, the same or similar components are denoted by the same reference numerals in these drawings.

1 to 5 show a first embodiment in which the present invention is applied to the head of an iron golf club. Referring to these figures, the club head 1
0 is a face body 11 occupying a part of the face surface,
The head main body 12 forming the remaining portion of the club head 10 is formed of a different metal, and the head main body 12 is integrally formed with a neck portion 13.

The head body 12 is formed with a cavity 14 which opens to the face surface and the back surface thereof. The void 14 is a bottomed recess 14 that opens to the face surface of the head body 12.
a and an opening 14b that opens to the bottom of the recess 14a and the back surface of the head body 12. The face body 11 is housed in the recess 14a of the head body 12,
The back surface of the face body 11 is in contact with the bottom surface of the recess 14a. Therefore, the face body 11 does not slip out behind the head body 12. But even face body 1
1 is pressed into the recess 14a, or the face body 1
Even if the head body 12 and the head body 12 are adhered to each other, the face body 11 is not sufficiently prevented from coming off in front of the head body 12.

Therefore, in this embodiment, the face body 11
A concave portion 15 is formed on one of the joints between the head body 12 and the head body 12, and a convex portion 16 that engages with the concave portion 15 is formed on the other side by plastic deformation, and serves to prevent the face body 11 from coming off. More specifically, as shown in FIG. 5, the concave portion 15 is a chamfer formed on the outer peripheral edge of the face body 11 on the face side, and the convex portion 16 that engages with the concave portion 15 is the concave portion 14 a of the head body 12 in advance. The protrusion 17 formed on the face surface of the head body 12 along the outer peripheral edge of the opening (see FIG.
(See (b) in the figure).

In this embodiment, the face body 11 is made of a light metal such as aluminum alloy, titanium, titanium alloy,
The head body 12 is made of a metal material having a larger specific gravity than the face body 11, such as stainless steel or beryllium copper,
The face body 11 is made of, for example, casting, forging, a spread material or the like, and the head body 12 is made of, for example, casting, forging or the like. The face body 11 may have a constant thickness, but in this embodiment, the thickness of the face body 11 increases from the top side toward the sole side.
When the face body 11 having such a structure is used, the mass of the head body 12 having a larger specific gravity than the face body 11 on the sole side can be deviated to the back side, thereby increasing the depth of the center of gravity from the face of the head. Can be made. Further, a part of the back surface of the face body 11 has an opening 14b.
Since it is exposed to the back surface side of the head body 12,
The exposed portion on the back surface of the face body 11 can be used as a display unit by previously forming characters, symbols, designs, etc. by engraving.

In the club head having the above structure, the face body 11 housed in the recess 14a of the head body 12 has the concave portion 15 formed in the face body 11 and the convex portion 16 formed by plastic deformation of the head body 12. The engagement between the face body 11 and the head main body 12 is strong because the front body 11 and the head body 12 are prevented from coming off. In addition, since no welding is required, the appearance is excellent.

Further, in this embodiment, since the convex portion 16 formed by plastic deformation is formed on the head main body 12, the head main body 1
When 2 is softer than the face body 11, the concave-convex engaging portion can be easily formed.

The concave portion 15 and the convex portion 16 can be formed over the entire circumference of the face body 11 and the entire concave portion 14a, respectively. However, a part of the outer circumference of the face body 11 and the peripheral edge of the opening of the concave portion 14a can be formed. You may form in one part. Further, in this embodiment, the cavity 14 has the opening 14b that opens into the recess 14a, but the opening 14b may be omitted and only the recess 14a may be formed.

FIG. 6 shows a second embodiment of the present invention. In this embodiment, as shown in FIG. 1A, a concave portion 15 in the form of an annular groove is formed on the outer peripheral surface of the face body 11, and the concave portion 14 is previously formed on the face surface of the head body 12.
A projecting portion 17 is formed in an annular shape along the outer periphery of the opening of a. Then, as shown in FIG. 2B, the face surface side of the head main body 12 is press-molded and the projecting portion 17 is crushed to form the convex portion 16 that engages with the concave portion 15.

7 to 10 show the third to third cases in which the convex portion 16 is formed by the plastic deformation of the face body 11, respectively.
A sixth embodiment is shown.

In the third embodiment shown in FIG. 7, the same drawing is used.
As shown in (a), the recess 15 is the recess 1 of the head body 12.
It is formed on the inner side surface near the bottom surface of 4a, and a protruding portion 18 is formed in advance near the outer circumference of the back surface of the face body 11. Then, as shown in FIG.
Is press-molded in the recess 14a, so that the convex portion 1 engaging with the concave portion 15 is formed on the outer peripheral portion of the face body 11 near the back surface.
6 is formed.

In this embodiment, the concavo-convex engaging portion can be easily formed when the face body 11 is made of a metal material softer than the head body 12. Further, since the protrusion 18 formed in advance near the outer periphery of the back surface of the face body 11 is crushed to form the protrusion 16, the protrusion 16 can be easily formed.

In the fourth embodiment shown in FIG. 8, the recess 1
5 is formed on the inner side surface near the bottom surface of the recess 14a of the head body 12, and the bottom surface of the recess 14a near the recess 15 has a projection 19 for plastically deforming the outer peripheral surface of the back surface of the face body 11 outward. Are provided integrally. Further, in the fifth embodiment shown in FIG. 9, a protrusion 19 in the form of a ring that plastically deforms the outer peripheral portion of the back surface of the face body 11 outward is provided on the bottom surface of the recess 14a near the recess 15. It is provided separately from.

In these embodiments, the face body 1
1 is press-molded in the recess 14a, the face body 1
The outer peripheral portion of the back surface of 1 can be easily plastically deformed outward by the protrusion 19, and the protrusion 16 that engages with the recess 15 can be easily formed.

In the sixth embodiment shown in FIG. 10, the cavity 14 of the head body 12 has an opening 14b which opens to the bottom surface of the recess 14a and the back surface of the head body 12, and the face body 11 is concave. It has a protrusion 20 that protrudes from the rear surface that abuts the bottom surface of the place 14a and that fits into the opening 14b. A recess 15 is formed on the periphery of the opening 14b on the back surface side of the head body 12 (see FIG. 7A), and the projection 20 of the face body 11 is press-molded to engage with the recess 15. The convex portion 16 is formed (see FIG. 7B).

In this embodiment, since the concave and convex engaging portions of the concave portion 15 and the convex portion 16 are formed on the back surface side of the head main body 12, the convex portion 16 is different from the case where the concave and convex engaging portions are formed on the face surface side. It is possible to minimize the influence of the plastic deformation of the on the face surface. Therefore, it is possible to easily obtain a club head with stable finishing accuracy and characteristics.

Although the embodiments shown in the drawings have been described above, the present invention is not limited to the embodiments described above.
Various modifications can be made to the constituent elements within the scope of the invention described in the claims. For example, the face body may occupy almost the entire face surface of the head, or may be located from the face surface to a part of the sole surface or the top surface. It goes without saying that the present invention can be applied not only to the head for iron clubs but also to the head for wood clubs.

[0036]

As is apparent from the above description, according to the present invention, the face body is housed in the void formed in the face surface of the head body, and the joint portion between the face body and the head body is formed. Since the concave portion is formed on one side and the convex portion that engages with the concave portion is formed by plastic deformation to prevent the face body from coming off, the face body made of a different metal and the head body are firmly coupled and aesthetically pleasing. It is possible to provide an excellent golf club head.

[Brief description of drawings]

FIG. 1 is a front view of an iron club head showing a first embodiment of the present invention.

FIG. 2 is a rear view of the main part of the head shown in FIG.

FIG. 3 is a plan view of the head shown in FIG.

4 is a cross-sectional view of the head shown in FIG. 1 taken along line 4-4 in FIG.

5 (a) and 5 (b) are enlarged cross-sectional views of a main part showing a manufacturing process of the club head shown in FIG.

6 (a) and 6 (b) are enlarged cross-sectional views of a main part showing the structure of the club head according to the second embodiment of the present invention and the manufacturing process thereof.

7 (a) and 7 (b) are enlarged cross-sectional views of a main part showing a structure of a club head according to a third embodiment of the present invention and a manufacturing process thereof.

8A and 8B are enlarged cross-sectional views of a main part showing the structure of a club head according to a fourth embodiment of the present invention and the manufacturing process thereof.

9 (a) and 9 (b) are enlarged cross-sectional views of a main part showing a structure of a club head according to a fifth embodiment of the present invention and a manufacturing process thereof.

10 (a) and 10 (b) are sectional views showing the structure of a club head according to a sixth embodiment of the present invention and the manufacturing process thereof.

[Explanation of symbols]

 10 club head 11 face body 12 head body 14 void 14a recess 14b opening 15 recess 16 protrusion 17 protrusion 17 protrusion 19 protrusion 20 protrusion 20

Claims (6)

[Claims] 1. A golf club head having a head body and a face body made of different kinds of metal, wherein the face body is housed in a space formed in the face surface of the head body, and the face body and the head body are provided. A golf club head, characterized in that a concave portion is formed on one of the joint portions, and a convex portion that engages with the concave portion is formed on the other portion by plastic deformation to prevent the face body from coming off. 2. The head body has a bottomed recess that opens to the face surface of the face body, and the face body is in contact with the bottom surface of the recess to prevent the head body from being pulled out rearward, and The golf club head according to claim 1, wherein engagement between the concave portion and the convex portion prevents the head body from being pulled out toward the front. 3. The concave portion is formed on the outer peripheral portion of the face body, and the convex portion engages with the concave portion by press molding of a protrusion portion formed in advance on the periphery of the concave opening portion of the face surface of the head body. 3. The structure according to claim 2, wherein
The golf club head described in 1. 4. The concave portion is formed on the inner surface of the concave portion of the head body, and the convex portion engaging with the concave portion is formed on the outer peripheral portion of the face body by press-molding the face body in the concave portion. The golf club head according to claim 2, wherein the golf club head is formed. 5. The recess is formed on an inner side surface near the bottom of the recess of the head body, and a protrusion for plastically deforming the outer periphery of the back surface of the face body near the recess on the bottom of the recess. The golf club head according to claim 4, wherein the golf club head is provided integrally or separately. 6. The head body further has an opening that opens to the bottom surface of the recess and the back surface of the head body, and the face body projects from the back surface that abuts the bottom surface of the recess and fits into the opening. A protruding portion of the face body and an opening portion of the head body, the concave portion is formed on one of the joint portions.
The golf club head according to claim 2, wherein the convex portion that engages with the concave portion is formed by plastic deformation on the other hand.